

How about factoring in vehicle wear, tear, insurance, and depreciation? You said “hybrid” so I’m thinking car, not bicycle. And cars are pretty damn pricy per (especially city) mile, hybrid or not. Also regular insurance policies often don’t allow doing such gigs for obvious reasons.
I also don’t know labor laws in the US, but here those companies got in major trouble because even ignoring the exploitative nature of the gig, they were misclassifying employment as “contract work” which allowed them to avoid paying employment taxes, days off, medical pay, insurance, etc. basically displacing all that burden on the State’s social systems. That’s the definition of unsustainable.
Linguistics is a descriptive science.
Language though is not science, it’s a cultural practice. Adhering to a specific set of rules to signal belonging to a specific cultural subgroup is perfectly normal; and deviation from those rules is not a socially neutral act. When and how you deviate signals a lot of things about you and what you’re saying.
That’s why slang is fascinating. It always tells a story. Whether it’s English Prep School jargon that breached containment, whitewashed AAVL, group in-jokes, unconventional emojis, etc., a slang word says a lot about the person who uses it.
That is to say, if you unironically start saying “rooves”, I can’t say whether you’ll start a trend that will ultimately change English forever (weirder things have happened). But I can assure you that the immediate effect will be that people will label you “tumblr weirdo”. Which would be a correct assessment, so that’s effective subtextual communication. Yay linguistics!